BL Lacertae: X-ray spectral evolution and a black-hole mass estimate

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Volume 602 (June 2017)

A&A, 602 (2017) A113

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Table 7

Best-fit parameters of the ASCA, Suzaku and Swift spectra of BL Lac in the 0.45−10 keV range using the phabs*BMC model.

Satellite	Observational ID	α = Γ − 1	T_s (eV)	N_BMC^a	N_H^b	(d.o.f.)

ASCA	15505000	0.32±0.04	100±7	2.43±0.10	0.27±0.09	1.02 (338)
	73088000	0.71±0.02	99±5	3.19±0.08	0.42±0.08	0.86 (131)
	77000000	0.68±0.01	91±2	3.57±0.09	0.29±0.09	1.14 (252)

Suzaku	701073010	1.02±0.03	143±10	7.25±0.63	0.27±0.07	1.15 (818)
	707044010	0.92±0.02	128±9	11.51±0.05	0.23±0.09	1.06 (521)

Swift	Band-A	0.95±0.11	190±10	3.3±0.2	0.27^c	0.72 (326)
	Band-B	1.00±0.20	288±7	4.5±0.1	0.27^c	0.94 (160)
	Band-C	1.04±0.05	91±6	6.3±0.3	0.27^c	0.97 (551)
	Band-D	1.08±0.17	143±8	8.1±0.5	0.27^c	0.96 (272)

Notes. Errors are given at the 90% confidence level.

^(a)

The normalization parameters of blackbody and BMC components are in units of erg s^-1 kpc^-2, where is the soft photon luminosity in units of 10³⁴ erg s^-1, d₁₀ is the distance to the source in units of 10 kpc.

^(b)

N_H is the column density for the neutral absorber, in units of 10²² cm^-2 (see details in the text). T_s is the seed photon temperature (in eV).

^(c)

Indicates that a parameter was fixed.

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